9.5 If two secants are tangent to a circle from the same external point, then the segments are of equal length.
9.5.2 If 2 secants intersect outside a circle, then the product of the lengths of one secant segment and its external segment = the product of the lengths of the other secant segment and its external segment
9.5.3 If a secant and tangent intersect outside a circle, then the product of the lengths of the secant segment and its external segment = the length of the tangent segment squared
9.5.4 If two chords intersect inside in a circle, then the product of the lengths of the segments of one chord = the product of the lenghts of the segments of the other chord
9.5 If two secants are tangent to a circle from the same external point, then the segments are of equal length.
9.5.2 If 2 secants intersect outside a circle, then the product of the lengths of one secant segment and its external segment = the product of the lengths of the other secant segment and its external segment
9.5.3 If a secant and tangent intersect outside a circle, then the product of the lengths of the secant segment and its external segment = the length of the tangent segment squared
9.5.4 If two chords intersect inside in a circle, then the product of the lengths of the segments of one chord = the product of the lenghts of the segments of the other chord